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Re: Vocalization intensity and species density

Subject: Re: Vocalization intensity and species density
From: Doug Von Gausig <>
Date: Fri, 19 Apr 2002 08:02:03 -0700
At 08:04 PM 4/18/2002, Mark Oberle wrote:
>Although it might make sense, I could only find a few papers arguing that
>at low densities, such as at the edge  of their range, species might tend
>to vocalize less than at higher population densities, with a lot of singin=
>rivals nearby. Does anyone have any similar or counter impressions?

My observation is that most Passerines are stimulated to sing by other
birds singing near them. Not just by their own species, either . In fact
they are often stimulated to sing by almost any other sound - which is why=

so many good recordings are made just as airplanes fly by!

Doug Von Gausig
Clarkdale, Arizona, USA
Nature Recordists e-mail group

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